eet 110 – survey of electronics chapter 3. lab measurements lab 2-2 – resistor color code –use...

EET 110 – Survey of EET 110 – Survey of ElectronicsElectronics

Chapter 3Chapter 3

Lab MeasurementsLab Measurements

Lab 2-2 – Resistor Color CodeLab 2-2 – Resistor Color Code– Use the text to determine valueUse the text to determine value– Use care in interpreting the colors on Use care in interpreting the colors on

the devicesthe devices– Virtually ALL of our components will be Virtually ALL of our components will be

either three or four band resistorseither three or four band resistors– If you happen across a five band If you happen across a five band

resistor, just ignore the fifth bandresistor, just ignore the fifth band

Lab 2-3 – Measuring ResistanceLab 2-3 – Measuring Resistance– Note – although the parts list calls for a Note – although the parts list calls for a

2.5k potentiometer, the actual lab asked 2.5k potentiometer, the actual lab asked for a 200 ohm pot. Use the 2.5k or 500 for a 200 ohm pot. Use the 2.5k or 500 ohm – just correct the listohm – just correct the list

– Measurements will be made with the Measurements will be made with the ANALOG meterANALOG meter

– Note – your body resistance will affect Note – your body resistance will affect the measurement.the measurement.

Lab 2-4 – Measuring Voltage Lab 2-4 – Measuring Voltage – All parts except 200 ohm pot are in the All parts except 200 ohm pot are in the

Hickok kits: we will substitute a 500 ohm Hickok kits: we will substitute a 500 ohm pot.pot.

– Measurements will be made using the Measurements will be made using the Simpson analog meter AND the DMMSimpson analog meter AND the DMM

– Voltage will be supplied by the triplet Voltage will be supplied by the triplet power supply.power supply.

Lab 2-5 – Measuring CurrentLab 2-5 – Measuring Current– Again, parts will come from the Hickok Again, parts will come from the Hickok

kitskits– Also, we will use both the analog and Also, we will use both the analog and

digital (DMM) meters & compare resultsdigital (DMM) meters & compare results

FIGURE 3-1FIGURE 3-1 Basic parts of a computer. Basic parts of a computer.

Dale R. PatrickDale R. PatrickElectricity and Electronics: A Survey, Electricity and Electronics: A Survey, 5e5e

FIGURE 3-3FIGURE 3-3 Computer screen for a circuit simulation software. Computer screen for a circuit simulation software.

FIGURE 3-4FIGURE 3-4 Ohm’s law circle: V-voltage; I-current; R-resistance. To use the circle, Ohm’s law circle: V-voltage; I-current; R-resistance. To use the circle, cover the value you want to find and read the other values as they appear in the cover the value you want to find and read the other values as they appear in the formula: V = I ( R; I = V/R; R =V/I.formula: V = I ( R; I = V/R; R =V/I.

FIGURE 3-5FIGURE 3-5 Ohm’s law example. Ohm’s law example.

FIGURE 3-6FIGURE 3-6 Effect of doubling the voltage. Effect of doubling the voltage.

FIGURE 3-7FIGURE 3-7 Effect of increasing resistance. Effect of increasing resistance.

FIGURE 3-8FIGURE 3-8 Ohm’s law examples. Ohm’s law examples.

FIGURE 3-9FIGURE 3-9 Using Ohm’s law to find voltage. Using Ohm’s law to find voltage.

FIGURE 3-10FIGURE 3-10 Using Ohm’s law to find resistance. Using Ohm’s law to find resistance.

FIGURE 3-11FIGURE 3-11 Circuit to show subscripts. Circuit to show subscripts.

FIGURE 3-12FIGURE 3-12 Series electrical circuit. Series electrical circuit.

FIGURE 3-13FIGURE 3-13 Finding total resistance in a series circuit. Finding total resistance in a series circuit.

FIGURE 3-14FIGURE 3-14 Two lamps connected in a series. Two lamps connected in a series.

FIGURE 3-15FIGURE 3-15 Using Ohm’s law for a series circuit. Using Ohm’s law for a series circuit.

FIGURE 3-16FIGURE 3-16 Effect of adding resistance to a series circuit. Effect of adding resistance to a series circuit.

FIGURE 3-17FIGURE 3-17 Parallel electrical circuit. Parallel electrical circuit.

FIGURE 3-18FIGURE 3-18 Current flow in a parallel circuit. Current flow in a parallel circuit.

FIGURE 3-19FIGURE 3-19 Finding total resistance of a parallel circuit. Finding total resistance of a parallel circuit.

FIGURE 3-20FIGURE 3-20 Finding total resistance when all resistances are the same. Finding total resistance when all resistances are the same.

FIGURE 3-21FIGURE 3-21 Three lamps connected in parallel. Three lamps connected in parallel.

FIGURE 3-22FIGURE 3-22 Sample parallel circuit problem. Sample parallel circuit problem.

FIGURE 3-23FIGURE 3-23 Making measurements in a parallel circuit: (a) original Making measurements in a parallel circuit: (a) original circuit; (b) circuit set up to measure current through path 1.circuit; (b) circuit set up to measure current through path 1.

FIGURE 3-23FIGURE 3-23 continued continued Making measurements in a parallel circuit: (a) Making measurements in a parallel circuit: (a) original circuit; (b) circuit set up to measure current through path 1.original circuit; (b) circuit set up to measure current through path 1.

FIGURE 3-24FIGURE 3-24 Simple combination circuit. Simple combination circuit.

FIGURE 3-25FIGURE 3-25 Combination circuit. Combination circuit.

FIGURE 3-26FIGURE 3-26 Current paths in a combination circuit. Current paths in a combination circuit.

FIGURE 3-27FIGURE 3-27 Combination-circuit example. Combination-circuit example.

FIGURE 3-28FIGURE 3-28 Kirchhoff’s laws: (a) voltage law example; (b) current law Kirchhoff’s laws: (a) voltage law example; (b) current law examples.examples.

FIGURE 3-28FIGURE 3-28 continued continued Kirchhoff’s laws: (a) voltage law example; (b) Kirchhoff’s laws: (a) voltage law example; (b) current law examples.current law examples.

FIGURE 3-29FIGURE 3-29 Series-circuit example. Series-circuit example.

FIGURE 3-30FIGURE 3-30 Series-circuit example. Series-circuit example.

FIGURE 3-31FIGURE 3-31 Parallel-circuit example. Parallel-circuit example.

FIGURE 3-32FIGURE 3-32 Current flow in a parallel circuit: (a) one path; (b) two paths; Current flow in a parallel circuit: (a) one path; (b) two paths; (c) R2 changed to 5 (c) R2 changed to 5

FIGURE 3-32FIGURE 3-32 continued continued Current flow in a parallel circuit: (a) one path; (b) Current flow in a parallel circuit: (a) one path; (b) two paths; (c) R2 changed to 5 two paths; (c) R2 changed to 5

FIGURE 3-35FIGURE 3-35 Formulas for finding voltage, current, resistance, or power. Formulas for finding voltage, current, resistance, or power.

FIGURE 3-36FIGURE 3-36 Finding power in a series circuit. Finding power in a series circuit.

FIGURE 3-37FIGURE 3-37 Finding power values in a parallel circuit. Finding power values in a parallel circuit.

FIGURE 3-38FIGURE 3-38 Problem that shows maximum power transfer. Problem that shows maximum power transfer.

FIGURE 3-39FIGURE 3-39 Voltage-divider circuits: (a) series dc circuit used as a Voltage-divider circuits: (a) series dc circuit used as a voltage divider; (b) tapped resistor used as a voltage divider; (c) voltage divider; (b) tapped resistor used as a voltage divider; (c) potentiometer used as a voltage divider.potentiometer used as a voltage divider.

FIGURE 3-39FIGURE 3-39 continued continued Voltage-divider circuits: (a) series dc circuit used Voltage-divider circuits: (a) series dc circuit used as a voltage divider; (b) tapped resistor used as a voltage divider; (c) as a voltage divider; (b) tapped resistor used as a voltage divider; (c) potentiometer used as a voltage divider.potentiometer used as a voltage divider.

FIGURE 3-40FIGURE 3-40 Voltage-divider design. Voltage-divider design.

FIGURE 3-41FIGURE 3-41 Voltage division: (a) equation for problem solving; (b) Voltage division: (a) equation for problem solving; (b) sample problem.sample problem.

FIGURE 3-41FIGURE 3-41 continued continued Voltage division: (a) equation for problem solving; Voltage division: (a) equation for problem solving; (b) sample problem.(b) sample problem.

FIGURE 3-42FIGURE 3-42 Negative voltage derived from a voltage divider. Negative voltage derived from a voltage divider.

FIGURE 3-43FIGURE 3-43 Voltage-divider design problem: (a) circuit; (b) voltage Voltage-divider design problem: (a) circuit; (b) voltage values.values.

FIGURE 3-43FIGURE 3-43 continued continued Voltage-divider design problem: (a) circuit; (b) Voltage-divider design problem: (a) circuit; (b) voltage values.voltage values.

FIGURE 3-44FIGURE 3-44 Kirchhoff’s voltage law: (a) voltage drop procedure; (b) Kirchhoff’s voltage law: (a) voltage drop procedure; (b) algebraic procedure.algebraic procedure.

FIGURE 3-45FIGURE 3-45 Voltage law example. Voltage law example.

FIGURE 3-46FIGURE 3-46 Kirchhoff’s voltage law example problem. Kirchhoff’s voltage law example problem.

FIGURE 3-47FIGURE 3-47 The superposition method: (a) original circuit; (b) circuit with The superposition method: (a) original circuit; (b) circuit with 30-V source shorted; © circuit with 10-V source shorted; (d) original circuit 30-V source shorted; © circuit with 10-V source shorted; (d) original circuit with currents recorded.with currents recorded.

FIGURE 3-48FIGURE 3-48 Thevinin equivalent circuit. Thevinin equivalent circuit.

FIGURE 3-49FIGURE 3-49 Using the Thevinin method for a one-source circuit: (a) Using the Thevinin method for a one-source circuit: (a) original circuit; (b) problem-solving procedure; (c) Thevinin equivalent original circuit; (b) problem-solving procedure; (c) Thevinin equivalent circuit.circuit.

FIGURE 3-50FIGURE 3-50 Determining circuit configuration for finding RTH. Determining circuit configuration for finding RTH.

FIGURE 3-51FIGURE 3-51 Calculating load current and voltage output. Calculating load current and voltage output.

FIGURE 3-52FIGURE 3-52 Two-source Thevinin equivalent circuit: (a) problem-solving Two-source Thevinin equivalent circuit: (a) problem-solving procedures; (b) Thevinin equivalent circuit.procedures; (b) Thevinin equivalent circuit.

FIGURE 3-53FIGURE 3-53 Norton equivalent circuit. Norton equivalent circuit.

FIGURE 3-54FIGURE 3-54 Norton equivalent circuit procedure: (a) problem-solving Norton equivalent circuit procedure: (a) problem-solving procedure; (b) Norton equivalent circuit.procedure; (b) Norton equivalent circuit.

FIGURE 3-55FIGURE 3-55 Bridge circuit. Bridge circuit.

FIGURE 3-56FIGURE 3-56 Simplification of a bridge circuit. Simplification of a bridge circuit.

FIGURE 3-57FIGURE 3-57 Calculating load current and voltage output of a bridge Calculating load current and voltage output of a bridge circuit.circuit.

eet 110 – survey of electronics chapter 3. lab measurements lab 2-2 – resistor color code –use...

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